Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1a25282395f026…

MALICIOUS

PDF

68.5 KB Created: 2020-08-17 11:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d255f7fbd6e44b4db734820711e8785 SHA-1: 0c98fe9859a54001f6865ab4249114ee88f81be1 SHA-256: 4b1a25282395f026298a5c0a4da39ee1a351de12a5005b831bb91bb24ab7dd3f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a car manual, which is a common lure for phishing or malware distribution. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=manual+usuario+audi+q5+2014+pdf In PDF document text
    • http://wukune.schoolcafeclub.org/uploads/1/3/0/7/130740069/1f4c5e339.pdfIn PDF document text
    • http://pivawe.bigbucksobx.com/uploads/1/3/1/6/131637223/00b33748515.pdfIn PDF document text
    • http://vupebog.boonvillenychurch.org/uploads/1/3/1/0/131070161/4d0a595.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/e2_80_9ctemtem_e2_80_9d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/safevomezuropasomubukire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/wijavukabopirige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/push_project_to_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/44884760061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/reportage_sur_le_loup_en_france.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1459/7271/files/adaptive_behavior_inventory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/65605057235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/2855/0556/files/filehippo_to_word_converter.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABAD 5704 bytes
SHA-256: 6a223183745e3bd1907835381b0e67c8797bbfcc5759323483a44209e9ea45bc
font_01_sfnt_off0000bf2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2E 15812 bytes
SHA-256: a94678b1b3775d5bce717f61dd0b76810ff62db98a4f1525943340c7c23d2a95
font_02_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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